I find you can have a proper discussion with fans of any club if they are knowledge about football. And if they are, they tend to appreciate how we play. Always happy to talk players or tactics about both my and their club.
However most clubs, including City, have lots of people who have limited knowledge who believe what they read as fact. Hence we have the haters and City bingo. Cheats, buying the title, state owned, money given not earned, Arab plaything, mercenary players, empty seats, no fans, human rights, bald fraud, etc etc etc - these muppets can go fuck themselves.
Given there are many more of the second sort than the first, I rarely bring up football with people I dont know, or with those I do know who fall into the second category.